/// <summary>
        /// 修改一条密码
        /// </summary>
        public bool UpdatePassWord(string UserName, string PassWord)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("update Admin set ");
            strSql.Append("[PassWord]=@PassWord");
            strSql.Append(" where UserName=@UserName");
            OleDbParameter[] parameters = {
                    new OleDbParameter("@UserName", OleDbType.VarChar,50),
                    new OleDbParameter("@PassWord", OleDbType.VarChar,50)};
            parameters[0].Value = UserName;
            parameters[1].Value = PassWord;
            int rows = DBUtility.DbHelperAccess.ExecuteNonQuery(strSql.ToString(), CommandType.Text, parameters);
            if (rows > 0)
            {
                return true;
            }
            else
            {
                return false;
            }
        }